1-Azaxanthone-3-carboxylic acids, their preparation and pharmaceutical compositions containing them

Novel 1-azaxanthone-3-carboxylic acid derivatives, which are shown by the following formula (I) wherein R is hydrogen, alkyl, alkoxy or halogen; R1 and R2 are the same or different and each is hydrogen, alkyl or alkenyl; and m is 1 or 2; and their physiologically acceptable salts, are usable as effe...

Full description

Saved in:
Bibliographic Details
Main Authors UKAWA, KIYOSHI, ISHIGURO, TOSHIHIRO, NOHARA, AKIRA
Format Patent
LanguageEnglish
French
German
Published 08.04.1981
Subjects
Online AccessGet full text

Cover

Loading…
More Information
Summary:Novel 1-azaxanthone-3-carboxylic acid derivatives, which are shown by the following formula (I) wherein R is hydrogen, alkyl, alkoxy or halogen; R1 and R2 are the same or different and each is hydrogen, alkyl or alkenyl; and m is 1 or 2; and their physiologically acceptable salts, are usable as effective medicines for preventing and/or treating allergic diseases. The compound of the formula (I) can be produced by reacting a compound of the formula: wherein R and m have the same meaning as defined above; R3 is carboxyl or group which is convertible into carboxyl through hydrolysis; X is alkyl phosphate radical or halogen, with a compound of the formula: wherein R1 and R2 have the same meaning as defined above, or its salt, and conducting hydrolysis, if necessary.
Bibliography:Application Number: EP19800303461